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1. The anomalous magnetic moment of the muon in the Standard Model

Author

Aoyama, T., Asmussen, N., Benayoun, M., Bijnens, J., Blum, T., Bruno, M., Caprini, I., Calame, C. M. Carloni, Cè, M., Colangelo, G., Curciarello, F., Czyż, H., Danilkin, I., Davier, M., Davies, C. T. H., Della Morte, M., Eidelman, S. I., El-Khadra, A. X., Gérardin, A., Giusti, D., Golterman, M., Gottlieb, Steven, Gülpers, V., Hagelstein, F., Hayakawa, M., Herdoíza, G., Hertzog, D. W., Hoecker, A., Hoferichter, M., Hoid, B. -L., Hudspith, R. J., Ignatov, F., Izubuchi, T., Jegerlehner, F., Jin, L., Keshavarzi, A., Kinoshita, T., Kubis, B., Kupich, A., Kupść, A., Laub, L., Lehner, C., Lellouch, L., Logashenko, I., Malaescu, B., Maltman, K., Marinković, M. K., Masjuan, P., Meyer, A. S., Meyer, H. B., Mibe, T., Miura, K., Müller, S. E., Nio, M., Nomura, D., Nyffeler, A., Pascalutsa, V., Passera, M., del Rio, E. Perez, Peris, S., Portelli, A., Procura, M., Redmer, C. F., Roberts, B. L., Sánchez-Puertas, P., Serednyakov, S., Shwartz, B., Simula, S., Stöckinger, D., Stöckinger-Kim, H., Stoffer, P., Teubner, T., Van de Water, R., Vanderhaeghen, M., Venanzoni, G., von Hippel, G., Wittig, H., Zhang, Z., Achasov, M. N., Bashir, A., Cardoso, N., Chakraborty, B., Chao, E. -H., Charles, J., Crivellin, A., Deineka, O., Denig, A., DeTar, C., Dominguez, C. A., Dorokhov, A. E., Druzhinin, V. P., Eichmann, G., Fael, M., Fischer, C. S., Gámiz, E., Gelzer, Z., Green, J. R., Guellati-Khelifa, S., Hatton, D., Hermansson-Truedsson, N., Holz, S., Hörz, B., Knecht, M., Koponen, J., Kronfeld, A. S., Laiho, J., Leupold, S., Mackenzie, P. B., Marciano, W. J., McNeile, C., Mohler, D., Monnard, J., Neil, E. T., Nesterenko, A. V., Ottnad, K., Pauk, V., Radzhabov, A. E., de Rafael, E., Raya, K., Risch, A., Rodríguez-Sánchez, A., Roig, P., José, T. San, Solodov, E. P., Sugar, R., Todyshev, K. Yu., Vainshtein, A., Avilés-Casco, A. Vaquero, Weil, E., Wilhelm, J., Williams, R., and Zhevlakov, A. S.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Lattice, Nuclear Experiment, Nuclear Theory
Abstract

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant $\alpha$ and is broken down into pure QED, electroweak, and hadronic contributions. The pure QED contribution is by far the largest and has been evaluated up to and including $\mathcal{O}(\alpha^5)$ with negligible numerical uncertainty. The electroweak contribution is suppressed by $(m_\mu/M_W)^2$ and only shows up at the level of the seventh significant digit. It has been evaluated up to two loops and is known to better than one percent. Hadronic contributions are the most difficult to calculate and are responsible for almost all of the theoretical uncertainty. The leading hadronic contribution appears at $\mathcal{O}(\alpha^2)$ and is due to hadronic vacuum polarization, whereas at $\mathcal{O}(\alpha^3)$ the hadronic light-by-light scattering contribution appears. Given the low characteristic scale of this observable, these contributions have to be calculated with nonperturbative methods, in particular, dispersion relations and the lattice approach to QCD. The largest part of this review is dedicated to a detailed account of recent efforts to improve the calculation of these two contributions with either a data-driven, dispersive approach, or a first-principle, lattice-QCD approach. The final result reads $a_\mu^\text{SM}=116\,591\,810(43)\times 10^{-11}$ and is smaller than the Brookhaven measurement by 3.7$\sigma$. The experimental uncertainty will soon be reduced by up to a factor four by the new experiment currently running at Fermilab, and also by the future J-PARC experiment. This and the prospects to further reduce the theoretical uncertainty in the near future-which are also discussed here-make this quantity one of the most promising places to look for evidence of new physics., Comment: 196 pages, 103 figures, version published in Phys. Rept., bib files for the citation references are available from: https://muon-gm2-theory.illinois.edu

Published
2020
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2. Determination of the pole position of the lightest hybrid meson candidate

Author

JPAC Collaboration, Rodas, A., Pilloni, A., Albaladejo, M., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Mikhasenko, M., Nys, J., Pauk, V., Ketzer, B., and Szczepaniak, A.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

Mapping states with explicit gluonic degrees of freedom in the light sector is a challenge, and has led to controversies in the past. In particular, the experiments have reported two different hybrid candidates with spin-exotic signature, pi1(1400) and pi1(1600), which couple separately to eta pi and eta' pi. This picture is not compatible with recent Lattice QCD estimates for hybrid states, nor with most phenomenological models. We consider the recent partial wave analysis of the eta(') pi system by the COMPASS collaboration. We fit the extracted intensities and phases with a coupled-channel amplitude that enforces the unitarity and analyticity of the S-matrix. We provide a robust extraction of a single exotic pi1 resonant pole, with mass and width 1564 +- 24 +- 86 MeV and 492 +- 54 +- 102 MeV, which couples to both eta(') pi channels. We find no evidence for a second exotic state. We also provide the resonance parameters of the a2(1320) and a2'(1700)., Comment: 6 pages + 3 pages of supplemental material. Version to appear on Phys.Rev.Lett

Published
2018
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3. Analyticity Constraints for Hadron Amplitudes: Going High to Heal Low Energy Issues

Author

JPAC Collaboration, Mathieu, V., Nys, J., Pilloni, A., Fernández-Ramírez, C., Jackura, A., Mikhasenko, M., Pauk, V., Szczepaniak, A. P., and Fox, G.

Subjects
High Energy Physics - Phenomenology
Abstract

Analyticity constitutes a rigid constraint on hadron scattering amplitudes. This property is used to relate models in different energy regimes. Using meson photoproduction as a benchmark, we show how to test contemporary low energy models directly against high energy data. This method pinpoints deficiencies of the models and treads a path to further improvement. The implementation of this technique enables one to produce more stable and reliable partial waves for future use in hadron spectroscopy and new physics searches., Comment: 5 pages, 3 figures

Published
2017

4. New analysis of $\eta\pi$ tensor resonances measured at the COMPASS experiment

Author

Jackura, A., Fernandez-Ramirez, C., Mikhasenko, M., Pilloni, A., Mathieu, V., Nys, J., Pauk, V., Szczepaniak, A. P., Fox, G., Aghasyan, M., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., Badelek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Buechele, M., Burtsev, V. E., Chang, W. -C., Chatterjee, C., Chiosso, M., Choi, I., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Crespo, M. L., Torre, S. Dalla, Dasgupta, S. S., Dasgupta, S., Denisov, O. Yu., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, Ch., Duennweber, W., Dusaev, R. R., Dziewiecki, M., Efremov, A., Eversheim, P. D., Faessler, M., Ferrero, A., Finger, M., Finger jr., M., Fischer, H., Franco, C., von Hohenesche, N. du Fresne, Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grasso, A., Perdekamp, M. Grosse, Grube, B., Grussenmeyer, T., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., d'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Yu., Iwata, T., Jary, V., Joosten, R., Joerg, P., Kabuss, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Koenigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Kral, Z., Kraemer, M., Kremser, P., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kuznetsov, I. I., Kveton, A., Lednev, A. A., Levchenko, E. A., Levillain, M., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matousek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novy, J., Nowak, W. -D., Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -C., Pereira, F., Pesek, M., Peskova, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Rogacheva, N. S., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, P., Schluter, T., Schmidt, K., Schmieden, H., Schoenning, K., Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Tasevsky, M., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vasilishin, B. I., Vauth, A., Veloso, J., Vidon, A., Virius, M., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, P., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., and Ziembicki, M.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We present a new amplitude analysis of the $\eta\pi$ $D$-wave in $\pi^- p\to \eta\pi^- p$ measured by COMPASS. Employing an analytical model based on the principles of the relativistic $S$-matrix, we find two resonances that can be identified with the $a_2(1320)$ and the excited $a_2^\prime(1700)$, and perform a comprehensive analysis of their pole positions. For the mass and width of the $a_2$ we find $M=(1307 \pm 1 \pm 6)$~MeV and $\Gamma=(112 \pm 1 \pm 8)$~MeV, and for the excited state $a_2^\prime$ we obtain $M=(1720 \pm 10 \pm 60)$~MeV and $\Gamma=(280\pm 10 \pm 70)$~MeV, respectively., Comment: 15 pages, 6 figures

Published
2017
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5. Analytic structure of $\phi^4$ theory using light-by-light sum rules

Author

Pauk, V., Pascalutsa, V., and Vanderhaeghen, M.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Theory, Nuclear Theory
Abstract

We apply a sum rule for the forward light-by-light scattering process within the context of the $\phi^4$ quantum field theory. As a consequence of the sum rule a stringent causality criterion is presented and the resulting constraints are studied within a particular resummation of graphs. Such resummation is demonstrated to be consistent with the sum rule to all orders of perturbation theory. We furthermore show the appearance of particular non-perturbative solutions within such approximation to be a necessary requirement of the sum rule. For a range of values of the coupling constant, these solutions manifest themselves as a physical bound state and a $K$-matrix pole. For another domain however, they appear as tachyon solutions, showing the inconsistency of the approximation in this region., Comment: 12 pages, 7 figures

Published
2013
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6. 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Moving Forward into the LHC Era

Author

Deile, Mario, d'Enterria, David, De Roeck, Albert, Albrow, M. G., Alkin, A., Avsar, E., Bednyakov, V. A., Brower, R., Bunyatyan, A., Burkhardt, H., Caldwell, A., Carvalho, W., Chaichian, M., Chapon, E., del Valle, Z. Conesa, Cudell, J. R., Dainton, J., Deak, M., Djuric, M., Eggert, K., Eidelman, S., Ellis, J., Ferreira, E., Forshaw, J., Giani, S., Gotsman, E., Goulianos, K., de Cassagnac, R. Granier, Grafstrom, P., Grebenyuk, A., Grube, B., Hautmann, F., Heinemeyer, S., Heller, M., Hoerandel, J., Hollar, J., Hoyer, P., Huitu, K., Hwang, D. S., Islam, M. M., Jenkovszky, L. L., Jung, H., Juranek, V., Kaidalov, A., Kaspar, J., Keates, J., Kepka, O., Khein, L., Khoze, V. A., Kodama, T., Kohara, A. K., Kowalski, H., Kundrat, V., Kutak, K., Lappi, T., Lipatov, L., Lokajicek, M., Lokhtin, I. P., Luddy, R. J., Lykasov, G. I., Lyuboshitz, V. V., Lyuboshitz, V. L., Lyubushkin, V. V., Lyubushkina, T. V., Managadze, A. K., Maor, U., Marage, P., Martin, A., Martynov, E., Marzani, S., Mesropian, C., Newman, P., Niewiadomski, G., Pasechnik, R. S., Pauk, V., Petrov, V., Pierog, T., Pilkington, A. D., Pinfold, J., Poghosyan, M., Prokudin, A. V., Proskuryakov, A., Rojo, J., Romanets, E., Ross, D. A., Royon, C., Ruggiero, G., Ryskin, M. G., Safarik, K., Sarycheva, L. I., Schicker, R., Schwennsen, F., Selyugin, O. V., Snigirev, A. M., Soffer, J., Stanev, T, Strikman, M., Szczurek, A., Tan, C. -. I, Tasevsky, M., Teryaev, O. V., Tricomi, A., Troshin, S. M., Tyurin, N. E., Watt, G., Weiglein, G., Werner, K., and Yaschenko, S.

Subjects
High Energy Physics - Phenomenology, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, Nuclear Experiment, Nuclear Theory
Abstract

Proceedings of the 13th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Moving Forward into the LHC Era, Comment: 511 pages. Proceedings of the 13th International Conference on Elastic and Diffractive Scattering, CERN, Geneva, June-July 2009

Published
2010

7. Inclusive distributions in the unitarized pomeron models

Author

Alkin, A., Martynov, E., Pauk, V., and Romanets, E.

Subjects
High Energy Physics - Phenomenology
Abstract

High energy inclusive hadron production in the central kinematical region is analyzed within the models of unitarized pomeron. It is shown that the sum of multipomeron exchanges with intercept $\alpha_P(0)>1$ reproduce qualitatively contribution of the triple pole (at $t=0$) pomeron to inclusive cross section. Basing on this analogy we then suggest a general form of unitarized pomeron contributions (in particular the dipole or tripole pomeron) to inclusive cross section. They lead to a parabolic form of the rapidity distribution giving $\propto \ln^3s$ (tripole) or $\propto \ln^2s$ (dipole). The models considered with suggested parametrization of $p_t$-dependence for cross sections well describe the rapidity distributions data in $pp$ and $\bar pp$ interactions at energy $\sqrt{s}\geq 200$ GeV. The predictions for one particle inclusive production at LHC energies are given., Comment: 12 pages, 11 figures

Published
2009

12. The anomalous magnetic moment of the muon in the Standard Model

Author

Aoyama, T., primary, Asmussen, N., additional, Benayoun, M., additional, Bijnens, J., additional, Blum, T., additional, Bruno, M., additional, Caprini, I., additional, Carloni Calame, C.M., additional, Cè, M., additional, Colangelo, G., additional, Curciarello, F., additional, Czyż, H., additional, Danilkin, I., additional, Davier, M., additional, Davies, C.T.H., additional, Della Morte, M., additional, Eidelman, S.I., additional, El-Khadra, A.X., additional, Gérardin, A., additional, Giusti, D., additional, Golterman, M., additional, Gottlieb, Steven, additional, Gülpers, V., additional, Hagelstein, F., additional, Hayakawa, M., additional, Herdoíza, G., additional, Hertzog, D.W., additional, Hoecker, A., additional, Hoferichter, M., additional, Hoid, B.-L., additional, Hudspith, R.J., additional, Ignatov, F., additional, Izubuchi, T., additional, Jegerlehner, F., additional, Jin, L., additional, Keshavarzi, A., additional, Kinoshita, T., additional, Kubis, B., additional, Kupich, A., additional, Kupść, A., additional, Laub, L., additional, Lehner, C., additional, Lellouch, L., additional, Logashenko, I., additional, Malaescu, B., additional, Maltman, K., additional, Marinković, M.K., additional, Masjuan, P., additional, Meyer, A.S., additional, Meyer, H.B., additional, Mibe, T., additional, Miura, K., additional, Müller, S.E., additional, Nio, M., additional, Nomura, D., additional, Nyffeler, A., additional, Pascalutsa, V., additional, Passera, M., additional, Perez del Rio, E., additional, Peris, S., additional, Portelli, A., additional, Procura, M., additional, Redmer, C.F., additional, Roberts, B.L., additional, Sánchez-Puertas, P., additional, Serednyakov, S., additional, Shwartz, B., additional, Simula, S., additional, Stöckinger, D., additional, Stöckinger-Kim, H., additional, Stoffer, P., additional, Teubner, T., additional, Van de Water, R., additional, Vanderhaeghen, M., additional, Venanzoni, G., additional, von Hippel, G., additional, Wittig, H., additional, Zhang, Z., additional, Achasov, M.N., additional, Bashir, A., additional, Cardoso, N., additional, Chakraborty, B., additional, Chao, E.-H., additional, Charles, J., additional, Crivellin, A., additional, Deineka, O., additional, Denig, A., additional, DeTar, C., additional, Dominguez, C.A., additional, Dorokhov, A.E., additional, Druzhinin, V.P., additional, Eichmann, G., additional, Fael, M., additional, Fischer, C.S., additional, Gámiz, E., additional, Gelzer, Z., additional, Green, J.R., additional, Guellati-Khelifa, S., additional, Hatton, D., additional, Hermansson-Truedsson, N., additional, Holz, S., additional, Hörz, B., additional, Knecht, M., additional, Koponen, J., additional, Kronfeld, A.S., additional, Laiho, J., additional, Leupold, S., additional, Mackenzie, P.B., additional, Marciano, W.J., additional, McNeile, C., additional, Mohler, D., additional, Monnard, J., additional, Neil, E.T., additional, Nesterenko, A.V., additional, Ottnad, K., additional, Pauk, V., additional, Radzhabov, A.E., additional, de Rafael, E., additional, Raya, K., additional, Risch, A., additional, Rodríguez-Sánchez, A., additional, Roig, P., additional, San José, T., additional, Solodov, E.P., additional, Sugar, R., additional, Todyshev, K. Yu., additional, Vainshtein, A., additional, Vaquero Avilés-Casco, A., additional, Weil, E., additional, Wilhelm, J., additional, Williams, R., additional, and Zhevlakov, A.S., additional

Published
2020
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25. Determination of the pole position of the lightest hybrid meson candidate

Author

Rodas Bilbao, Arkaitz, Pilloni, A., Albaladejo, M., Fernández Ramírez, César, Jackura, A., Mathieu, Vincent, Mikhasenko, M., Nys, J., Pauk, V., Ketzer, B., Szczepaniak, A. P., Rodas Bilbao, Arkaitz, Pilloni, A., Albaladejo, M., Fernández Ramírez, César, Jackura, A., Mathieu, Vincent, Mikhasenko, M., Nys, J., Pauk, V., Ketzer, B., and Szczepaniak, A. P.

Abstract

©2019 American Physical Society We would like to thank the COMPASS Collaboration for useful comments. A. P. thanks the Mainz Institute for Theoretical Physics (MITP) for its kind hospitality while this work was being completed. This work was supported by the U.S. Department of Energy under Grants No. DE-AC05-06OR23177 and No. DE-FG02-87ER40365, U.S. National Science Foundation under Grant No. PHY-1415459, Ministerio de Ciencia, Innovacion y Universidades (Spain) Grants No. FPA2016-75654-C2-2-P and No. FPA2016-77313-P, Universidad Complutense de Madrid predoctoral scholarship program, Research Foundation-Flanders (FWO), PAPIIT-DGAPA (UNAM, Mexico) under Grants No. IA101717 and No. IA101819, CONACYT (Mexico) under Grant No. 251817, the German Bundesministerium fur Bildung und Forschung (BMBF), and Deutsche Forschungsgemeinschaft (DFG) through the Collaborative Research Center [The Low-Energy Frontier of the Standard Model (SFB 1044)] and the Cluster of Excellence [Precision Physics, Fundamental Interactions and Structure of Matter (PRISMA)]., Mapping states with explicit gluonic degrees of freedom in the light sector is a challenge, and has led to controversies in the past. In particular, the experiments have reported two different hybrid candidates with spin-exotic signature, pi¬_1(1400) and pi_1 (1600), which couple separately to eta pi and eta'pi. This picture is not compatible with recent Lattice QCD estimates for hybrid states, nor with most phenomenological models. We consider the recent partial wave analysis of the eta^(')pi system by the COMPASS Collaboration. We fit the extracted intensities and phases with a coupled-channel amplitude that enforces the unitarity and analyticity of the S matrix. We provide a robust extraction of a single exotic pi_1 resonant pole, with mass and width 1564 +/- 24 +/- 86 and 492 +/- 54 +/- 102 MeV, which couples to both eta^(')pi channels. We find no evidence for a second exotic state. We also provide the resonance parameters of the a_2 (1320) and a_2^' (1700)., Ministerio de Ciencia e Innovación (MICINN), Universidad Complutense de Madrid predoctoral scholarship program, German Bundesministerium fur Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Collaborative Research Center [The Low-Energy Frontier of the Standard Model], Cluster of Excellence [Precision Physics, Fundamental Interactions and Structure of Matter (PRISMA)], Depto. de Física Teórica, Fac. de Ciencias Físicas, TRUE, pub

Published
2019

27. New analysis of ηπ tensor resonances measured at the COMPASS experiment

Author

Jackura, A., primary, Fernández-Ramírez, C., additional, Mikhasenko, M., additional, Pilloni, A., additional, Mathieu, V., additional, Nys, J., additional, Pauk, V., additional, Szczepaniak, A.P., additional, Fox, G., additional, Aghasyan, M., additional, Akhunzyanov, R., additional, Alexeev, M.G., additional, Alexeev, G.D., additional, Amoroso, A., additional, Andrieux, V., additional, Anfimov, N.V., additional, Anosov, V., additional, Antoshkin, A., additional, Augsten, K., additional, Augustyniak, W., additional, Austregesilo, A., additional, Azevedo, C.D.R., additional, Badełek, B., additional, Balestra, F., additional, Ball, M., additional, Barth, J., additional, Beck, R., additional, Bedfer, Y., additional, Bernhard, J., additional, Bicker, K., additional, Bielert, E.R., additional, Birsa, R., additional, Bodlak, M., additional, Bordalo, P., additional, Bradamante, F., additional, Bressan, A., additional, Büchele, M., additional, Burtsev, V.E., additional, Chang, W.-C., additional, Chatterjee, C., additional, Chiosso, M., additional, Choi, I., additional, Chumakov, A.G., additional, Chung, S.-U., additional, Cicuttin, A., additional, Crespo, M.L., additional, Dalla Torre, S., additional, Dasgupta, S.S., additional, Dasgupta, S., additional, Denisov, O.Yu., additional, Dhara, L., additional, Donskov, S.V., additional, Doshita, N., additional, Dreisbach, Ch., additional, Dünnweber, W., additional, Dusaev, R.R., additional, Dziewiecki, M., additional, Efremov, A., additional, Eversheim, P.D., additional, Faessler, M., additional, Ferrero, A., additional, Finger, M., additional, Fischer, H., additional, Franco, C., additional, du Fresne von Hohenesche, N., additional, Friedrich, J.M., additional, Frolov, V., additional, Fuchey, E., additional, Gautheron, F., additional, Gavrichtchouk, O.P., additional, Gerassimov, S., additional, Giarra, J., additional, Giordano, F., additional, Gnesi, I., additional, Gorzellik, M., additional, Grasso, A., additional, Grosse Perdekamp, M., additional, Grube, B., additional, Grussenmeyer, T., additional, Guskov, A., additional, Hahne, D., additional, Hamar, G., additional, von Harrach, D., additional, Heinsius, F.H., additional, Heitz, R., additional, Herrmann, F., additional, Horikawa, N., additional, d'Hose, N., additional, Hsieh, C.-Y., additional, Huber, S., additional, Ishimoto, S., additional, Ivanov, A., additional, Ivanshin, Yu., additional, Iwata, T., additional, Jary, V., additional, Joosten, R., additional, Jörg, P., additional, Kabuß, E., additional, Kerbizi, A., additional, Ketzer, B., additional, Khaustov, G.V., additional, Khokhlov, Yu.A., additional, Kisselev, Yu., additional, Klein, F., additional, Koivuniemi, J.H., additional, Kolosov, V.N., additional, Kondo, K., additional, Königsmann, K., additional, Konorov, I., additional, Konstantinov, V.F., additional, Kotzinian, A.M., additional, Kouznetsov, O.M., additional, Kral, Z., additional, Krämer, M., additional, Kremser, P., additional, Krinner, F., additional, Kroumchtein, Z.V., additional, Kulinich, Y., additional, Kunne, F., additional, Kurek, K., additional, Kurjata, R.P., additional, Kuznetsov, I.I., additional, Kveton, A., additional, Lednev, A.A., additional, Levchenko, E.A., additional, Levillain, M., additional, Levorato, S., additional, Lian, Y.-S., additional, Lichtenstadt, J., additional, Longo, R., additional, Lyubovitskij, V.E., additional, Maggiora, A., additional, Magnon, A., additional, Makins, N., additional, Makke, N., additional, Mallot, G.K., additional, Mamon, S.A., additional, Marianski, B., additional, Martin, A., additional, Marzec, J., additional, Matoušek, J., additional, Matsuda, H., additional, Matsuda, T., additional, Meshcheryakov, G.V., additional, Meyer, M., additional, Meyer, W., additional, Mikhailov, Yu.V., additional, Mitrofanov, E., additional, Mitrofanov, N., additional, Miyachi, Y., additional, Nagaytsev, A., additional, Nerling, F., additional, Neyret, D., additional, Nový, J., additional, Nowak, W.-D., additional, Nukazuka, G., additional, Nunes, A.S., additional, Olshevsky, A.G., additional, Orlov, I., additional, Ostrick, M., additional, Panzieri, D., additional, Parsamyan, B., additional, Paul, S., additional, Peng, J.-C., additional, Pereira, F., additional, Pešek, M., additional, Pešková, M., additional, Peshekhonov, D.V., additional, Pierre, N., additional, Platchkov, S., additional, Pochodzalla, J., additional, Polyakov, V.A., additional, Pretz, J., additional, Quaresma, M., additional, Quintans, C., additional, Ramos, S., additional, Regali, C., additional, Reicherz, G., additional, Riedl, C., additional, Rogacheva, N.S., additional, Ryabchikov, D.I., additional, Rybnikov, A., additional, Rychter, A., additional, Salac, R., additional, Samoylenko, V.D., additional, Sandacz, A., additional, Santos, C., additional, Sarkar, S., additional, Savin, I.A., additional, Sawada, T., additional, Sbrizzai, G., additional, Schiavon, P., additional, Schlüter, T., additional, Schmidt, K., additional, Schmieden, H., additional, Schönning, K., additional, Seder, E., additional, Selyunin, A., additional, Silva, L., additional, Sinha, L., additional, Sirtl, S., additional, Slunecka, M., additional, Smolik, J., additional, Srnka, A., additional, Steffen, D., additional, Stolarski, M., additional, Subrt, O., additional, Sulc, M., additional, Suzuki, H., additional, Szabelski, A., additional, Szameitat, T., additional, Sznajder, P., additional, Tasevsky, M., additional, Tessaro, S., additional, Tessarotto, F., additional, Thiel, A., additional, Tomsa, J., additional, Tosello, F., additional, Tskhay, V., additional, Uhl, S., additional, Vasilishin, B.I., additional, Vauth, A., additional, Veloso, J., additional, Vidon, A., additional, Virius, M., additional, Wallner, S., additional, Weisrock, T., additional, Wilfert, M., additional, ter Wolbeek, J., additional, Zaremba, K., additional, Zavada, P., additional, Zavertyaev, M., additional, Zemlyanichkina, E., additional, Zhuravlev, N., additional, and Ziembicki, M., additional

Published
2018
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28. New analysis of eta pi tensor resonances measured at the COMPASS experiment

Author

Jackura, A., Fernandez-Ramirez, C., Mikhasenko, M., Pilloni, A., Mathieu, V., Nys, J., Pauk, V., Szczepaniak, A. P., Fox, G., Aghasyan, M., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., Badelek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Buechele, M., Burtsev, V. E., Chang, W. -C, Chatterjee, C., Chiosso, M., Choi, I., Chumakov, A. G., Chung, S. -U, Cicuttin, A., Crespo, M. L., DallaTorre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Yu., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, Ch., Duennweber, W., Dusaev, R. R., Dziewiecki, M., Efremov, A., Franco, C., von Hohenesche, N. Du Fresne, Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grasso, A., GrossePerdekamp, M., Grube, B., Grussenmeyer, T., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., d'Hose, N., Hsieh, C. -Y, Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Yu., Iwata, T., Jary, V., Joosten, R., Joerg, P., Kabuss, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Koenigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Karl, Z., Kraemer, M., Kremser, R., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kuznetsov, I. I., Kveton, A., Lednev, A. A., Levchenko, E. A., Levillain, M., Levorato, S., Lian, Y. -S, Lichtenstadt, J. J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matousek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mitrofanov, E., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novy, J., Nowak, W. -D, Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -C, Pereira, F., Pesek, M., Pesekova, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Rogacheva, N. S., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, R., Schlueter, T., Schmidt, K., Schmieden, H., Schönning, Karin, Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, ., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, R., Tasevsky, M., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vasilishin, B. I., Vauth, A., Veloso, J., Vidon, A., Virius, M., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, R., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., Ziembicki, M., Jackura, A., Fernandez-Ramirez, C., Mikhasenko, M., Pilloni, A., Mathieu, V., Nys, J., Pauk, V., Szczepaniak, A. P., Fox, G., Aghasyan, M., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., Badelek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Buechele, M., Burtsev, V. E., Chang, W. -C, Chatterjee, C., Chiosso, M., Choi, I., Chumakov, A. G., Chung, S. -U, Cicuttin, A., Crespo, M. L., DallaTorre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Yu., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, Ch., Duennweber, W., Dusaev, R. R., Dziewiecki, M., Efremov, A., Franco, C., von Hohenesche, N. Du Fresne, Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grasso, A., GrossePerdekamp, M., Grube, B., Grussenmeyer, T., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., d'Hose, N., Hsieh, C. -Y, Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Yu., Iwata, T., Jary, V., Joosten, R., Joerg, P., Kabuss, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Koenigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Karl, Z., Kraemer, M., Kremser, R., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kuznetsov, I. I., Kveton, A., Lednev, A. A., Levchenko, E. A., Levillain, M., Levorato, S., Lian, Y. -S, Lichtenstadt, J. J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matousek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mitrofanov, E., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novy, J., Nowak, W. -D, Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -C, Pereira, F., Pesek, M., Pesekova, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Rogacheva, N. S., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, R., Schlueter, T., Schmidt, K., Schmieden, H., Schönning, Karin, Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, ., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, R., Tasevsky, M., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vasilishin, B. I., Vauth, A., Veloso, J., Vidon, A., Virius, M., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, R., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., and Ziembicki, M.

Abstract

We present a new amplitude analysis of the eta pi D-wave in the reaction pi(-) p -> eta pi(-) p measured by COMPASS. Employing an analytical model based on the principles of the relativistic S-matrix, we find two resonances that can be identified with the a(2)(1320) and the excited a(2)(1700), and perform a comprehensive analysis of their pole positions. For the mass and width of the a(2) we find M = (1307 +/- 1 6) MeV and Gamma=(112 +/- 1 +/- 8) MeV, and for the excited state a(2)' we obtain M = (1720 +/- 10 +/- 60) MeV and Gamma = (280 +/- 10 +/- 70) MeV, respectively.

Published
2018
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30. One-Particle Inclusive Distribution in the Unitarized Pomeron Models

Author

Alkin, A., Yevgen Martynov, Romanetc, O., and Pauk, V.

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Phenomenology
Abstract

It is shown that starting from the pomeron contribution with intercept P (0) > 1 one can obtain in a quasi-eikonal approach inclusive cross section which is similar to contribution of triple pole (at t = 0) pomeron. Generalizing this analogy we consider tripole and dipole pomeron contributions to inclusive cross section. They lead to hni / ln3 s (tripole) or hni / ln2 s (dipole) and describe well the data on charged hadron distributions in ¯pp. Predictions of one particle pt and rapidity distributions for LHC energies are given.

Published
2010

35. A contact problem for a thick layer showing wear and heat production.

Author

Grilitskii, D. and Pauk, V.

Abstract

A contact problem is considered and solved in thermoelasticity for a thick layer, which incorporates the surface microgeometry, wear, and frictional heat production. The treatment is reduced to a system of nonlinear integral equations, which is solved by successive approximation. Some new results are obtained. [ABSTRACT FROM AUTHOR]

Published
1991
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41. Crimean-Congo hemorrhagic fever in Rostov Province: the epidemiological characteristics of an outbreak,Krymskaia-Kongo gemorragicheskaia likhoradka v Rostovskoi oblasti: épidemiologicheskie osobennosti vspyshki

Author

Onishchenko, G. G., Aidinov, G. T., Moskvitina, E. A., Lomov, I. M., Tikhonov, N. G., Prometnoi, V. I., Shvager, M. M., Ryzhkov, V. I., Savchenko, P. P., Dmitrieva, T. A., Batashev, V. V., Pukhov, I. M., Pichurina, N. L., Ivanova, N. G., Gavrinev, S. A., Kovalev, E. V., Kipaikin, V. A., Pauk, V. L., Emel Ianova, Z. N., Orekhov, I. V., Lipkovich, A. D., Valeriy Stakheev, Trepel, V. G., Usatkin, A. V., Markov, V. I., Borisevich, I. V., Merkulov, V. A., Makhlai, A. A., Vasil Ev, N. T., Mishan Kin, B. N., Vodop Ianov, S. O., Mazrukho, T. V., and Badunenko, V. P.

45. Prevalence of Vancomycin-Resistant Enterococci and Antimicrobial Residues in Wastewater and Surface Water.

Author

Hricová K, Röderová M, Fryčák P, Pauk V, Kurka O, Mezerová K, Štosová T, Bardoň J, Milde D, Kučová P, and Kolář M

Abstract

Due to the extensive use of antimicrobial agents in human and veterinary medicine, residues of various antimicrobials get into wastewater and, subsequently, surface water. On the one hand, a combination of processes in wastewater treatment plants aims to eliminate chemical and biological pollutants; on the other hand, this environment may create conditions suitable for the horizontal transfer of resistance genes and potential selection of antibiotic-resistant bacteria. Wastewater and surface water samples (Morava River) were analyzed to determine the concentrations of 10 antibiotics and identify those exceeding so-called predicted no-effect environmental concentrations (PNECs). This study revealed that residues of five of the tested antimicrobials, namely ampicillin, clindamycin, tetracycline, tigecycline and vancomycin, in wastewater samples exceeded the PNEC. Vancomycin concentrations were analyzed with respect to the detected strains of vancomycin-resistant enterococci (VRE), in which the presence of resistance genes, virulence factors and potential relationship were analyzed. VRE were detected in 16 wastewater samples (11%) and two surface water samples (6%). The PNEC of vancomycin was exceed in 16% of the samples. Since the detected VRE did not correlate with the vancomycin concentrations, no direct relationship was confirmed between the residues of this antimicrobials and the presence of the resistant strains.

Published
2021
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46. Unified chromatography - Mass spectrometry as a versatile tool for determination of food dyes.

Author

Pauk V, Krejčí M, and Lemr K

Subjects
Chromatography, High Pressure Liquid, Chromatography, Liquid, Mass Spectrometry, Spectrum Analysis, Coloring Agents, Tartrazine
Abstract

Unified chromatography with mass spectrometric detection was assessed for determination of food dyes. Nineteen substances representing azo, triphenylmethane, xanthone, indigoid, quinoline and polyene classes covering an unprecedented range from nonpolar β-Carotene (logD 13.6) to ionic Tartrazine (logD -7.5) were analyzed simultaneously. The dyes were separated in a single experimental run by an 18-min gradient elution from 98% CO 2 to 100% aqueous-methanolic modifier on a diol column. Isomeric substances were resolved, and Isatin Sulfonic acid was detected as a degradation product of Indigo Carmine. Mobile phase properties reproducibly changed from supercritical to liquid state ensuring stable retention times (inter-day RSD<0.5%). Quantitative analysis of sports drinks after straightforward 10- or 25-fold dilution with dimethyl sulfoxide confirmed the method applicability to real-life samples. Sufficient limits of detection (typically 0.025 mg L -1 in processed samples, equivalent to 0.25 mg L -1 in drink) and a wide linear range (typically 0.5-50 mg L -1 or 1.3-125 mg L -1 in drink for 10× or 25× dilution, respectively) were demonstrated during validation. A comparison of method performance with competitive liquid chromatography procedures is also provided. Unified chromatography is a promising tool for comprehensive multiclass analysis of dyes in the context of food safety., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)

Published
2021
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47. Investigation of chromatographic peak broadening in supercritical fluid chromatography/atmospheric pressure chemical ionization mass spectrometry.

Author

Pauk V and Lemr K

Abstract

Multimode ionization source allows for switching between different ionization techniques, for example, electrospray and atmospheric pressure chemical ionization, within a single analysis. Supercritical fluid chromatography can handle a wide polarity range of substances from hydrophilic to lipophilic in a single run and can undoubtedly benefit from versatility of this ion source. Nevertheless, we observed a significant chromatographic peak broadening effect in atmospheric pressure chemical ionization mode during supercritical fluid chromatography-mass spectrometry analysis of volatile flavor compounds with a dual ion source named ESCi (Waters). Surprisingly, this effect was not related to the separation process but was triggered solely by the ion source conditions. Neither of photodiode array detector, electrospray mode nor a dedicated atmospheric pressure chemical ionization source suffered from such a phenomenon. Chromatographic peak profiles of ten test substances obtained with the dual ion source were compared with photodiode array detector data as a reference. The broadening effect was more pronounced for volatile compounds with low polarity. Dependence of peak broadening on the ion source settings was systematically investigated. Tuning of desolvation gas flow and its temperature dramatically reduced peak distortion and increased detection sensitivity., (© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2020
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48. Forensic applications of supercritical fluid chromatography - mass spectrometry.

Author

Pauk V and Lemr K

Subjects
Animals, Doping in Sports, Food Analysis, Humans, Plant Oils chemistry, Psychotropic Drugs analysis, Substance Abuse Detection, Chromatography, Supercritical Fluid methods, Illicit Drugs analysis, Mass Spectrometry methods
Abstract

Achievements of supercritical fluid chromatography with mass spectrometric detection made in the field of forensic science during the last decade are reviewed. The main topics include analysis of traditional drugs of abuse (e.g. cannabis, methamphetamine) as well as new psychoactive substances (synthetic cannabinoids, cathinones and phenethylamines), doping agents (anabolic steroids, stimulants, diuretics, analgesics etc.) and chemical warfare agents. Control of food authenticity, detection of adulteration and identification of toxic substances in food are also pointed out. Main aspects of an analytical workflow, such as sample preparation, separation and detection are discussed. A special attention is paid to the performance characteristics and validation parameters of supercritical fluid chromatography-mass spectrometric methods in comparison with other separation techniques., (Copyright © 2018 Elsevier B.V. All rights reserved.)

Published
2018
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49. Analysis of new psychoactive substances in human urine by ultra-high performance supercritical fluid and liquid chromatography: Validation and comparison.

Author

Borovcová L, Pauk V, and Lemr K

Subjects
Alkaloids, Calibration, Humans, Limit of Detection, Mass Spectrometry, Methanol urine, Phenethylamines urine, Reproducibility of Results, Solvents, Chromatography, High Pressure Liquid, Chromatography, Supercritical Fluid, Psychotropic Drugs analysis, Urinalysis methods
Abstract

New psychoactive substances represent serious social and health problem as tens of new compounds are detected in Europe annually. They often show structural proximity or even isomerism, which complicates their analysis. Two methods based on ultra high performance supercritical fluid chromatography and ultra high performance liquid chromatography with mass spectrometric detection were validated and compared. A simple dilute-filter-and-shoot protocol utilizing propan-2-ol or methanol for supercritical fluid or liquid chromatography, respectively, was proposed to detect and quantify 15 cathinones and phenethylamines in human urine. Both methods offered fast separation (<3 min) and short total analysis time. Precision was well <15% with a few exceptions in liquid chromatography. Limits of detection in urine ranged from 0.01 to 2.3 ng/mL, except for cathinone (5 ng/mL) in supercritical fluid chromatography. Nevertheless, this technique distinguished all analytes including four pairs of isomers, while liquid chromatography was unable to resolve fluoromethcathinone regioisomers. Concerning matrix effects and recoveries, supercritical fluid chromatography produced more uniform results for different compounds and at different concentration levels. This work demonstrates the performance and reliability of supercritical fluid chromatography and corroborates its applicability as an alternative tool for analysis of new psychoactive substances in biological matrixes., (© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2018
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50. Ultra-high performance supercritical fluid chromatography-mass spectrometry procedure for analysis of monosaccharides from plant gum binders.

Author

Pauk V, Pluháček T, Havlíček V, and Lemr K

Subjects
Paint analysis, Paper, Polysaccharides, Tandem Mass Spectrometry, Chromatography, Supercritical Fluid, Monosaccharides analysis, Plant Gums chemistry
Abstract

The ultra-high performance supercritical fluid chromatography-mass spectrometry (UHPSFC/MS) procedure for analysis of native monosaccharides was developed. Chromatographic conditions were investigated to separate a mixture of four hexoses, three pentoses, two deoxyhexoses and two uronic acids. Increasing water content in methanol modifier to 5% and formic acid to 4% improved peak shapes of neutral monosaccharides and allowed complete elution of highly polar uronic acids in a single run. An Acquity HSS C18SB column outperformed other three tested stationary phases (BEH (silica), BEH 2-ethylpyridine, CSH Fluoro-Phenyl) in terms of separation of isomers and analysis time (4.5 min). Limits of detection were in the range 0.01-0.12 ng μL -1 . Owing to separation of anomers, identification of critical pairs (arabinose-xylose and glucose-galactose) was possible. Feasibility of the new method was demonstrated on plant-derived polysaccharide binders. Samples of watercolor paints, painted paper and three plant gums widely encountered in painting media (Arabic, cherry and tragacanth) were decomposed prior the analysis by microwave-assisted hydrolysis at 40 bar initial pressure using 2 mol L -1 trifluoroacetic acid. Among tested temperatures, 120 °C ensured appropriate hydrolysis efficiency for different types of gum and avoided excessive degradation of labile monosaccharides. Procedure recovery tested on gum Arabic was 101% with an RSD below 8%. Aqueous hydrolysates containing monosaccharides in different ratios specific to each type of plant gum were diluted or analyzed directly. Filtration of samples before hydrolysis reduced interferences from a paper support and identification of gum Arabic in watercolor-painted paper samples was demonstrated. Successful identification of pure gum Arabic was confirmed for sample quantities as little as 1 μg. Two classification approaches were compared and principal component analysis was superior to analysis based on peak area ratios of monosaccharides. The proposed procedure using UHPSFC/MS represents an interesting alternative which can compete with other chromatographic methods in the field of saccharide analysis in terms of speed, sensitivity and simplicity of workflow., (Copyright © 2017 Elsevier B.V. All rights reserved.)

Published
2017
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